Which of these hypotheses cannot be tested by an experiment?
a. Biological interactions between barnacle species are responsible for their distribution patterns.
b. Night-feeding fishes rely on their sense of smell to locate prey.
c. The growth of salt marsh grass is limited by nitrogen availability.
d. Certain humpback whale behaviors are important for attracting a mate.
e. Goldfish prefer to eat brightly-colored foods.
D
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What may result when grafted tissue such as bone marrow contains passenger lymphocytes?
A. Graft versus host disease B. Formation of autoantibodies C. Hypogammaglobulinemia D. Host rejection of graft
Heterotrophs need only a few more genes than autotrophs
Indicate whether the statement is true or false.
What is the molecular mechanism by which reverse transcriptase inhibitors, such as AZT, prevent viral replication?
What will be an ideal response?
Which is the dominant greenhouse gas leading to global warming?
A) CH4 B) H2O C) NO2 D) CO2